Male reproductive Organs

Question 1

Prostate: anatomic position

Answer 1

Inferior to neck of bladder
Superior to external urethral sphincter
Inferiolateral: levator ani muscle

Question 2

Prostate: zones

Answer 2

Central zone
Transitional zone
Peripheral zone
(Fibromuscular stroma)

Question 3

Prostate: central zone

Answer 3

Surrounds ejaculatory ducts

25% of normal prostate

Question 4

Prostate: transitional zone

Answer 4

Located centrally and surrounds urethra
5-10% of gland
Glands of transitional zone typically undergo BPH

Question 5

Prostate: peripheral zone

Answer 5

Main body of the gland: 65%
Located posteriorly
Ducts from glands are vertically emptying into urethra. Tendency to permit urine reflux.
High incidence of acute/chronic inflammation: may be linked to high incidence of prostate carcinoma at peripheral zone

Question 6

Prostate: fibromuscular stroma

Answer 6

Situated anterior in the gland

Merges with tissue of urogenital diaphragm

Question 7

Prostate: blood supply

Answer 7

Prostatic arteries, branches of internal iliac (branches can arise from internal pudendal and middle rectal arteries)

Question 8

Prostate: venous drainage

Answer 8

Prostatic venous plexus, drains into internal iliac veins

Question 9

Prostate: innervation

Answer 9

Inferior hypogastric plexus